Maximum-indicator for measuring instruments.



G. D. HASKINS. MAXIMUM INDICATOR FOR MEASURING INSTRUMENTS.

APPLICATION FILED JUKE 22, 1906 Patented July 5, 1910.

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FOR BEEKLEUR NG'IIISTLZ Application filed ii'nne 253, 190 Serial. I10.

."ih all whom it mag; ooncm:

Bo it known i? n: L OARYL D. :r is'iuns, a 'Zon oi iliU nitoil States residing at i rchonocinrl m count of i v'ohcncctnnly, State of llcw i hnvo invented certain now and n'sui'ul nmrovomonl's in lniximinn-Inchoniors in ii 3; in union-ts, of which r is n ecilicni'ioio.

This invoninin re [ilA'fti no incnnnring insl'rnincnis, 21l1 l hose 7 its object the provision .11 dorici: oi? ihis olnirnotor in which the rzuigc throngrh which the movn :c clement of rho insirnmoni: hos boon czrrriod (flnring o spooiiioil period may ho inilicziicil in :1 simph' 21ml iii-cumin mnnnci'.

lily invention rchil'or more spcciiitnlly (o oloi-lrirnl inmsm'ing insilnmonin for making rcgistrntzoim progressively or corhi n i'ixcci' omonni'o of one; ihoy :iro nli'nincd on tho circnii in connection with whioh'iho in nrrnmoni'v is nor My invcni ion 15 inixcnileil to he ilsocl in connection with various types of .inslrnmonis, iihc iiozii'nronn" the invention jboing the recorcling of the limits movement.

Ono of ho objects of nrv invontion, thororow is in proviilo an instrument which will :i :onrniel rocoril (he mnxiinmn lonrl or onjv use i in on electrical circuit at any one no bot-Noon any (no observations, and l accomplish this rcsnh; by having: sorics oi i ilicntors which are arranged to drop or i hcriviso nsisinno n. (loi'initc position as tho poinior 0 rise instrument ronohos prodolon inincil positions The imiicators or rubs are mounted to move frool v'on a pivot concen- "i ric with {tho pointer and are marked to cor- :por Willi (ho markings on iiho scale of the inntrmnont. 'lho tubs nro arranged so that thov :incoussivcly como into a position in which they will fall by gravity, so as 10 indicate rhniz the pointer has rouohoil :1 posilion oorro-niioinling "to tho iinlicntions on these Y I in tho nocmxfnnying drawings; in which I have llills'illflifll one form of my invonlion,

' l ignro i. on olovotion of an instrument cator case; nncl some.

Referring to th Lli'flzVl 3 1 the case of an instrument haviin and n movable poinlor hill invention may c applied lo any 4 2m or inoirw incnt having 11 movable eiemoi Q shall show iifor pnrpocs of illnsiroiion-in coin tion with on Edison type of nnnnoac having a coil iand a core 5 sn-ppori by :in arm (3 adapted to swing; about the pivo Z and move the pointer iilonnieo cones! iricnllv with the pointer 3 in o cup-s incl vessel. 8 preferably or metal. This have shown as hcing connocnml ".i'li'li rho pivoti having: jeweled hearings E and l0 by moans of very thin Sheet motnh such no nhnnimnn,

which are very "zirci nlly f'lziiioncih These tabs each have n nninhor or other indication thereon 'so no to constiinio an indicnior. On the freo'omi of each iinb is projection 14 adopted to abut against :1 pin 15 soonroci. in he base of the cup. The longths of the projections on tho-:9 labs vary, so ihaisniccossivo tabs will be in ndvnnco of each orbs-ix The cnso is ihon covered with a cover or window 16, which is profnrzil'ily spun in so as to make a tight joint. The (also is then fillecl with n transparent", oil of medium viscosir-y.

This dose may be sccnre to the arm 3.1. by

means of :1 set screw 17.

The operation of my} device will he clearly HIMlLlSl'Oml from lho nhovo ilcfici'iption,

Vhon n loml is phioori on the inst nmnnt and The pointer is moved over its sonic the case S is roini'orl with lho pointer, and

its

eachtab as it falls drags itself away from 7 its neighbor very slowly, but after it leaves the adjacent tab it moves more rapidly. If, therefore, before it pulls away from its neighbor the pointer of the instrument should return to a point below the-required indication, the tab would move back to its original position against the stop pin 15. By loosening the set screw 17, the case 8 may be removed and the tabs returned to their original position. It will, therefore, be seen that I have produced a device in which a minimum of power is required for its operation, thus reducing the necessity for a high torque'iand doing away with the difficulties in balancing the moving element which have been inherent in the instruments heretofore devised. My device is capable of use, therefore, in connection with low torque instruments, such as Wattmeters, as well as other instruments having a higher torque.

It should be understood, of course, that many modifications and equivalent devices will suggest themselves to those skilled in the art, which, while diiferent in construction, will not depart from the spirit of my invention, the scope of which is set forth in. the'claims annexed hereto.

What I claim as new and desire to secure by Letters Patent of the United States, is,-

1. The combination with a measuring instrument having a movable element, of means for indicating the maximum movement of said element comprising a plurality of indicators slidable over one another with a retarded movement due to frictional engagement and arranged to be moved successively by said element throughout a predetermmed range and thereafter movable independently of said element.

2. The combination with a measuring instrument having a movable element, of means for indicating the maximum movement of said element comprising a plurality of indicators in frictional engagement with one another, and means whereby each indicator is successively moved with said element to a predetermined point and then automatically moved away from said element to a fixed point with a retarded movement due to sliding over the remaining adjacent indicator.

3. The combination with a measuring instrument having a movable element, of means for indicating the maximum movement of said element con'iprising a plurality of flat indicators mounted side by side and in frictional engagement with one another on a con'nnon pivot concentric with the pivot of said element, and a casing for said indicators dctachably connected to said element.

4. The combination with a measuring instrunn nt havinga movableclement, of means for indicating the maximum movement of said element comprising a plurality of flat indicators mounted side by side and in frictional engagement with one anotheron a conunon pivot concentric withthe pivot of said element, and a casing for said indicators containing a fluid for retarding the relative movement thereof.

5. The combination With a measuring instrument having a movable element, of means for indicating the maximum movement of said element comprising a plurality of indicators arranged in frictional engagement to have a retarded movement relative to one another, and means whereby said indicators are successively moved by said element to a predetermined position as the latter assumes successive positions.

6. The combination with a measuring instrumenthaving a movable element, of means for indicating the maximummovement of said element comprising a plurality of indicators mounted on a common pivot side by side and in frictional engagement with one another, and means whereby said indicators are successively moved by said element to a predetermined position as the element successively assumes dilferent predetermined positions.

I 7. The combination with a measuring instrument having a movable element, of means for indicating the maximum movement of said element comprising a plurality of relatively movable indicators frictionally engaging one another to retard the relative movement thereof, and means whereby said indicators are successively moved by said element to a position beyond the control of said element when the latter assumes successive positions.

8. The combination With a measuring instrument having a movable element, of means for indicating the maximum movement of said element comprising a plurality of indicators each arranged to be positively moved by said clement throughout a predetermined range and thereafter movable independently of said element, said indicators being mounted in frictional engagement with one another whereby the movement of each indicator is retarded by friction with the next re- 'maining adjacent indicator.

9. The combination with a measuring instrument havin a pivoted movable element, of means for indicating the maximum movement of said element comprising a plurality of freely-moving indicators pivoted concentrically with said element and means whereby said indicators are successively moved by said element to a predetermined position beyond the control of said element.

, 1,0. The combination with a measuring instrument having a pivoted movable element,

gravity through the retarding fluid to a fixed position.

In Witness whereof, I have hereunto set my hand this 21st day of June, 1906. GARYL D. HASKINS.

Witnesses I BENJAMIN B. HULL, HELEN ORFORD. 

